of the, Fishery Board for Scotland. 283 



last century Dutch busses frequented the loch of Strathbeg." At present 

 the sea is said to flow into it only during high-water of spring tides 

 through a sort of canal-like outlet, and the water is thus rendered some- 

 what brackish. The loch is moderately deep in some parts, but at the 

 time of our visit it was so shallow in some places at the north-east end 

 that it was necessary to propel the boat we were using by punting it. 

 It is also stated in the Old Statistical Account that an effort was once 

 made to drain the loch, but from some cause the attempt failed. It 

 contains perch and sea-trout but is little fished. The loch was partially 

 examined early in September last year (1890), while the 'Garland' was 

 windbound in Fraserburgh Harbour. Entomostraca were very abundant 

 — Ceriodaphnia reticulata and Cypridopsis aculeata being very common 

 species. The bottom of the part examined consisted very much of 

 blackish mud, having its surface covered in some places by a rust-coloured 

 deposit. Considerable portions of the bottom were overgrown by a 

 luxuriant crop of Cliara. I have no doubt that a careful examination of 

 the invertebrate fauna of this loch would yield interesting results. The 

 following are the organisms obtained during our visit in September : — 



MOLLUSCA. 



Pisidium pusillum (Gmelin). Frequent. 

 Planorbis spirorbis (Mtiller). Rather rare. 

 Limnoza peregra (Mtiller). Common. 



,, truncatula (Mtiller). Rather rare. 



CRUSTACEA. 



COPEPODA. 



Cyclops strenuus, Fischer. Frequent. 



,, tenuicornis, Claus. Not common. 



,, viridis, Jurine. Frequent. 



,, serrulatus, Fischer. Frequent, especially round the margin. 



, , crassicomis, 0. F. Mtiller. Frequent round the margin. 

 Canthocamptus, sp. Rather rare round the margin. 



OSTRACODA. 



Gypria serena (Koch). Common. 



„ Icevis (0. F. Mtiller). 



,, ophthalmica (Jurine). Frequent. 

 Erpetocypris reptans (Baird). Frequent. 

 Cypridopsis vidua (Mtiller). Frequent. 



,, villosa (Jurine). Frequent. 



,, aculeata (Lilljeborg). Very common. 



Candona Candida (Mtiller). Frequent. 

 Uyocypris gibba (Ramdohr). Not common. 

 Limnicythere inopinata (Baird). Frequent. 



Cladoceea. 



Ceriodaphnia reticulata (Jurine). Very common. 

 Simocephalus vetulus (Mtiller). Frequent. 

 Daphnia pulex (Linne). 



,, longispina, Mtiller. Frequent. 

 Eurycercus lamellatus (Mtiller). Not very common. 

 Pleuroxus trigonellus (Mtiller). Not very common. 



6. Loch Achnacloich. 



Loch Achnacloich, four or five miles north of Invergordon, Ross-shire, 

 is of small size, and easy of access. It was visited one day towards the 



